Optical element, optical composite element, and optical composite element having protective film

a technology of optical composite elements and protective films, which is applied in the field of optical composite elements and optical composite elements having protective films, can solve the problems of increased complexity of fabricating structures, molds become clogged with resin, and difficult structure shape maintenance, etc., and achieve excellent anti-reflective performance and anti-fouling performance.

Active Publication Date: 2017-10-26
OJI HLDG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is an optical element that has excellent performance in preventing reflective light and preventing fouling. This is achieved by creating multiple cavities and protrusions that stick out from the surface of the element.

Problems solved by technology

On the other hand, with higher aspect ratios, a fine convexity or concavity is structurally fragile, leading to difficulty in maintaining the shape of the structure.
There is also a problem in that higher aspect ratios lead to increased complications when fabricating the structure.
However, there is a problem in that, when the aspect ratio is high, the mold becomes clogged with resin or the like when transferring the prominent convex protrusions or concavities from the mold.
Additional problem for an anti-reflective structural body having fine prominent convex protrusions and concavities is deposition of a fine foreign object between the prominent convex protrusions or in the concavities, which may impair the anti-reflective effect.

Method used

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  • Optical element, optical composite element, and optical composite element having protective film
  • Optical element, optical composite element, and optical composite element having protective film
  • Optical element, optical composite element, and optical composite element having protective film

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0131]The reflectance spectrum at 5° was determined by simulation above for the optical element having the prominent convex protrusions. The results are shown in FIG. 6. In this case, the depth of the concavities was 300 nm, the pitch of the concavities was 120 nm, the diameter of the concavities was 100 nm, the height of the prominent convex protrusions was 100 nm, and the area ratio of the prominent convex protrusions was 15%. Light entered an interface with a refractive index of 1.5 from air with a refractive index of 1.0, at an angle of incidence of 5°, and the refractive index of the material of the anti-reflection layer was also 1.5. The depth, the pitch, and the diameter of the concavities, and the height of the prominent convex protrusions were fixed for the simulation, but corresponded to the respective modal values in reality.

example 2

[0132]In Example 2, all the factors were the same as in Example 1 except that the area ratio of the prominent convex protrusions was 2%. The reflectance spectrum at 5° was determined by simulation above for the optical element of Example 2. The results are shown in FIG. 6.

example 3

[0133]In Example 3, all the factors were the same as in Example 1 except that the height of the prominent convex protrusions was 30 nm. The reflectance spectrum at 5° was determined by simulation above for the optical element of Example 3. The results are shown in FIG. 6.

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PUM

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Abstract

An optical element having, on one surface thereof, multiple recessed sections arranged at a most frequent pitch equal to or less than the wavelength of light in the operating environment, the optical element having, when seen in plan view, multiple domains in which the multiple recessed sections are aligned in a predetermined arrangement, and, multiple protruding sections formed in a region sandwiched between the multiple domains and / or in a region surrounded by the multiple recessed sections inside the domains, the multiple protruding sections accounting for a surface area ratio of 1%-15% as seen in plan view.

Description

TECHNICAL FIELD[0001]The present invention relates to an optical element, an optical composite element and an optical composite element having a protective film.[0002]The present application claims priority to Japanese Patent Application No. 2014-217151, filed on Oct. 24, 2014, Japanese Patent Application No. 2014-220231, filed on Oct. 29, 2014, Japanese Patent Application No. 2014-220232, filed on Oct. 29, 2014, and Japanese Patent Application No. 2015-101968, filed on May 19, 2015, the contents of which are incorporated by reference herein.BACKGROUND ART[0003]Often, a film-like anti-reflection structure for improving visibility is provided on the surface of a display, for example, a computer. A method for preventing reflection by closely disposing a plurality of fine prominent convex protrusions on the surface of a transparent substrate (transparent film) has been proposed as this anti-reflection structure. The so-called “moth-eye structure” principle is applied in this method. Mo...

Claims

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Application Information

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IPC IPC(8): G02B1/118G02B1/14
CPCG02B1/14G02B1/118G02B1/111
InventorHONGO, KOKISHINOTSUKA, KEI
OwnerOJI HLDG CORP